* config/rs6000/rs6000.md: Document why a pattern is not

[pf3gnuchains/gcc-fork.git] / gcc / passes.c

diff --git a/gcc/passes.c b/gcc/passes.c
index aa5cb86..2453c74 100644 (file)
--- a/gcc/passes.c
+++ b/gcc/passes.c
@@ -522,7 +522,7 @@ rest_of_handle_stack_regs (tree decl, rtx insns)
     {
       if (cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_POST_REGSTACK
                       | (flag_crossjumping ? CLEANUP_CROSSJUMP : 0))
-         && flag_reorder_blocks)
+         && (flag_reorder_blocks || flag_reorder_blocks_and_partition))
        {
          reorder_basic_blocks ();
          cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_POST_REGSTACK);
@@ -718,9 +718,9 @@ rest_of_handle_reorder_blocks (tree decl, rtx insns)
 
   if (flag_sched2_use_traces && flag_schedule_insns_after_reload)
     tracer ();
-  if (flag_reorder_blocks)
+  if (flag_reorder_blocks || flag_reorder_blocks_and_partition)
     reorder_basic_blocks ();
-  if (flag_reorder_blocks
+  if (flag_reorder_blocks || flag_reorder_blocks_and_partition
       || (flag_sched2_use_traces && flag_schedule_insns_after_reload))
     changed |= cleanup_cfg (CLEANUP_EXPENSIVE
                            | (!HAVE_conditional_execution
@@ -1806,6 +1806,20 @@ rest_of_compilation (tree decl)
   if (flag_if_conversion)
     rest_of_handle_if_after_combine (decl, insns);
 
+  /* The optimization to partition hot/cold basic blocks into separate
+     sections of the .o file does not work well with exception handling.
+     Don't call it if there are exceptions. */
+
+  if (flag_reorder_blocks_and_partition && !flag_exceptions)
+    {
+      no_new_pseudos = 0;
+      partition_hot_cold_basic_blocks ();
+      allocate_reg_life_data ();
+      update_life_info (NULL, UPDATE_LIFE_GLOBAL_RM_NOTES, 
+                       PROP_LOG_LINKS | PROP_REG_INFO | PROP_DEATH_NOTES);
+      no_new_pseudos = 1;
+    }
+
   if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
     rest_of_handle_regmove (decl, insns);
 
@@ -2109,12 +2123,6 @@ rest_of_compilation (tree decl)
 
   /* We're done with this function.  Free up memory if we can.  */
   free_after_parsing (cfun);
-  if (! DECL_DEFER_OUTPUT (decl))
-    {
-      free_after_compilation (cfun);
-      DECL_STRUCT_FUNCTION (decl) = 0;
-    }
-  cfun = 0;
 
   ggc_collect ();